<template>
  <div class="list" ref="wrapper">
    <div>
      <div class="area">
        <div class="title border-topbottom">当前城市</div>
        <div class="button-list">
          <div class="button-wrapper">
            <div class="button-item">{{city}}</div>
          </div>
        </div>
      </div>
          <div class="area">
            <div class="title border-topbottom">热门城市</div>
            <div class="button-list">
              <div class="button-wrapper" v-for="item of hotCities" :key="item.id" @click="handleChangeCity(item.name)">
                <div class="button-item">{{item.name}}</div>
              </div>
            </div>
          </div>
      <div class="area" v-for="(item, key) of cities" :key="key" :ref="key">
        <div class="title border-topbottom">{{key}}</div>
        <div class="item-list">
          <div class="item border-bottom" v-for="innerItem of item" :key="innerItem.index" @click="handleChangeCity(innerItem.name)">{{innerItem.name}}</div>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import BScroll from 'better-scroll'
import { mapState, mapActions } from 'vuex'

export default{
  name: 'CityList',
  props: {
    hotCities: Array,
    cities: Object,
    letter: String
  },
  methods: {
    handleChangeCity (city) {
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapActions(['changeCity'])
  },
  watch: {
    letter () {
      if (this.letter) {
        const element = this.$refs[this.letter][0]
        this.scroll.scrollToElement(element)
      }
    }
  },
  computed: {
    ...mapState(['city'])
  },
  mounted () {
    this.scroll = new BScroll(this.$refs.wrapper)
  }
}
</script>

<style lang="stylus" scoped>
  .border-topbottom
    &:before
      border-color: #ccc
    &:after
      border-color: #ccc
  .border-bottom
    &:before
      border-color: #ccc
  .list
    position: absolute
    top: 1.58rem
    right: 0
    bottom: 0
    left: 0
    overflow: hidden
    .area
      .title
        line-height: .54rem
        background-color: #eeeeee;
        padding-left: .2rem
        color: #666666
        font-size: .26rem
      .button-list
        overflow: hidden
        padding: .1rem .6rem .1rem .1rem
        .button-wrapper
          float: left
          width: 33.33%
          .button-item
            padding: .1rem 0
            margin: .1rem
            text-align: center
            border: .02rem solid #cccccc
            border-radius: .06rem
      .item-list
        .item
          line-height: .76rem
          padding-left: .2rem
          color: #666666
</style>
